Hello everyone,
I measured the capacity of my two 800mAh batteries.
I drained both batteries until the motor assistance cut out, meaning until the charge level dropped from 2% to 1%.
I then fully charged them and measured the energy supplied both on the primary side using a Shelly and on the secondary side using a DC energy meter from AliExpress (Atorch CW20).
I consider the CW20 to be very accurate; at least, it displays a charging current of 5.996 amps during the constant-current phase and exactly 42.00 volts during the constant-voltage phase.
The results for the two batteries hardly differ; they show 727 Wh and 732 Wh of energy supplied, measured between the charger and the battery. On the primary side, it’s about 800 Wh in each case.
Considering that you can certainly draw even less energy due to heat loss, I find the +-730 Wh to be low for an “800” battery, which is even printed with a rated capacity of 811 Wh.
Ridecontrol App says my batteries are 93% SOH and 95 cycles, respectively 94% and 66 cycles.
My kitsemtb auxiliary battery performs better with 389 Wh of capacity at an officially rated 400 Wh.
Has anyone ever measured this before and has any comparison data, preferably from other brands as well?
-Tom
I measured the capacity of my two 800mAh batteries.
I drained both batteries until the motor assistance cut out, meaning until the charge level dropped from 2% to 1%.
I then fully charged them and measured the energy supplied both on the primary side using a Shelly and on the secondary side using a DC energy meter from AliExpress (Atorch CW20).
I consider the CW20 to be very accurate; at least, it displays a charging current of 5.996 amps during the constant-current phase and exactly 42.00 volts during the constant-voltage phase.
The results for the two batteries hardly differ; they show 727 Wh and 732 Wh of energy supplied, measured between the charger and the battery. On the primary side, it’s about 800 Wh in each case.
Considering that you can certainly draw even less energy due to heat loss, I find the +-730 Wh to be low for an “800” battery, which is even printed with a rated capacity of 811 Wh.
Ridecontrol App says my batteries are 93% SOH and 95 cycles, respectively 94% and 66 cycles.
My kitsemtb auxiliary battery performs better with 389 Wh of capacity at an officially rated 400 Wh.
Has anyone ever measured this before and has any comparison data, preferably from other brands as well?
-Tom
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